t3508: add check_head_differs_from() helper function and use it

diff --git a/http.c b/http.c
index 901e5972970e672f2524d70d11d4c3bb74ce98c5..1320c50e32eb7b8715b263bc2af089c3dbce39fa 100644 (file)
--- a/http.c
+++ b/http.c
@@ -816,7 +816,21 @@ static int http_request(const char *url, void *result, int target, int options)
                        ret = HTTP_OK;
                else if (missing_target(&results))
                        ret = HTTP_MISSING_TARGET;
-               else
+               else if (results.http_code == 401) {
+                       if (user_name) {
+                               ret = HTTP_NOAUTH;
+                       } else {
+                               /*
+                                * git_getpass is needed here because its very likely stdin/stdout are
+                                * pipes to our parent process.  So we instead need to use /dev/tty,
+                                * but that is non-portable.  Using git_getpass() can at least be stubbed
+                                * on other platforms with a different implementation if/when necessary.
+                                */
+                               user_name = xstrdup(git_getpass("Username: "));
+                               init_curl_http_auth(slot->curl);
+                               ret = HTTP_REAUTH;
+                       }
+               } else
                        ret = HTTP_ERROR;
        } else {
                error("Unable to start HTTP request for %s", url);
@@ -832,7 +846,11 @@ static int http_request(const char *url, void *result, int target, int options)
 
 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 {
-       return http_request(url, result, HTTP_REQUEST_STRBUF, options);
+       int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
+       if (http_ret == HTTP_REAUTH) {
+               http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
+       }
+       return http_ret;
 }
 
 /*